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Ulleksa [173]
4 years ago
10

Carbon dioxide can change directly from the solid phase to the gaseous phase. true or false

Chemistry
1 answer:
uysha [10]4 years ago
3 0
True, its called sublimation. (vice versa as well)
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Why are significant figures important when gathering data in the laboratory?
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Answer: Significant figures are important to show the precision of your answer. This is important in science and engineering because no measuring device can make a measurement with 100% precision. Using Significant figures allows the scientist to know how precise the answer is, or how much uncertainty there is.

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If 0.00872 mol neon gas at a particular temperature and pressure occupies a volume of 211 mL, what volume would 0.00701 mol neon
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0.00701 moles of neon gas will occupy 170 ml of volume under the same conditions.

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The relationship of number of moles and volume at constant temperature and pressure was given by Avogadro's law. This law states that volume is directly proportional to number of moles at constant temperature and pressure.

The equation used to calculate number of moles is given by:

\frac{V_1}{n_1}=\frac{V_2}{n_2}

where,

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Putting values in above equation, we get:

\frac{211 mL}{0.00872 mol}=\frac{V_2}{0.00701}

V_2=\frac{211 mL\tomes 0.00701 mol}{0.00872 mol}=169.62 mL\approx 170 mL

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(Pls explain I don't really understand the question)
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Answer:

When silver nitrate (AgNO3) and potassium chloride (KCl) combine in their liquid state, they form two products by double displacement method.

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Explanation:

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